When it comes to upgrading small-block engines, camshafts are a popular choice for enhancing performance. Different camshaft types can significantly alter how an engine breathes and performs, offering everything from increased horsepower to improved fuel efficiency. Whether you’re working on a classic muscle car or a modern powerhouse, the right camshaft can make a noticeable difference. Here’s a look at eight camshaft upgrades that can wake up your small-block engine.

High-Lift Camshafts

High-lift camshafts are designed to increase the valve lift, allowing more air and fuel to enter the combustion chamber. This can lead to significant horsepower gains, especially in engines that are already modified with improved intake and exhaust systems. A popular choice among muscle car enthusiasts, high-lift cams are ideal for engines like the Chevrolet 350 small-block, which benefits from the increased airflow.

When installing a high-lift camshaft, it’s important to ensure that the rest of the valvetrain components can support the increased lift. Upgrading to stronger springs and retainers is often necessary to prevent valve float and ensure durability. This type of camshaft is best suited for high-performance applications where maximum power output is a priority.

Roller Camshafts

Roller camshafts employ roller lifters instead of flat tappet lifters, reducing friction and allowing for more aggressive cam profiles. This results in better throttle response and increased power, making them a popular upgrade for street and strip applications. The LS1 engine found in late ’90s Chevrolet Corvettes is a great example of an engine that benefits from a roller camshaft swap.

One of the advantages of roller camshafts is their longevity and reliability. They tend to wear less over time compared to flat tappet camshafts, making them a worthwhile investment for those looking to maintain engine performance over the long haul. However, the initial cost is higher, and the installation process can be more complex.

Hydraulic Flat Tappet Camshafts

Hydraulic flat tappet camshafts are a classic choice for those looking to boost their small-block engine’s performance without breaking the bank. These camshafts are easy to install and offer a good balance of power and drivability. They are especially popular in older engines, such as the 1967 Chevrolet Camaro’s 327 small-block.

One of the main benefits of hydraulic flat tappet camshafts is their self-adjusting nature, which reduces maintenance requirements. However, they do require proper break-in procedures to prevent premature wear. While not as aggressive as roller camshafts, they provide a noticeable improvement in power for street-driven vehicles.

Solid Flat Tappet Camshafts

For those seeking a more aggressive camshaft upgrade, solid flat tappet camshafts offer increased performance potential. These camshafts are suitable for racing and high-performance street applications where maximum power is desired. The 1969 Ford Mustang Boss 302 is a prime example of a vehicle that can benefit from a solid flat tappet camshaft upgrade.

Unlike hydraulic camshafts, solid flat tappet camshafts require regular valve adjustments to maintain optimal performance. While they offer a more aggressive profile, they are not as forgiving when it comes to maintenance. This makes them better suited for enthusiasts who don’t mind a little extra upkeep in exchange for improved performance.

Dual Pattern Camshafts

Dual pattern camshafts offer a unique advantage by featuring different profiles for the intake and exhaust lobes. This allows for optimized airflow and improved engine efficiency, which can result in better overall performance. The 1987 Pontiac Firebird Trans Am is one vehicle that can achieve noticeable gains from a dual pattern camshaft.

This type of camshaft is ideal for engines with aftermarket cylinder heads or exhaust systems that require different timing events for optimal performance. Dual pattern camshafts are versatile and can be tailored to meet specific performance goals, making them a popular choice among tuners and builders.

High Duration Camshafts

High duration camshafts keep the valves open longer, which can enhance high RPM performance. This makes them well-suited for racing applications where engines operate at higher speeds. A classic example is the 1970 Chevrolet Chevelle SS 454, which can benefit from a high duration camshaft to maximize its performance potential.

While high duration camshafts deliver impressive gains at the top end, they can compromise low-end torque and drivability. These camshafts are best suited for engines that are frequently raced or driven in environments where high RPM performance is critical. Proper tuning is essential to ensure that the engine performs optimally across the entire RPM range.

Variable Valve Timing (VVT) Camshafts

Variable Valve Timing (VVT) camshafts offer the ability to adjust valve timing on the fly, optimizing performance across a wide range of conditions. This technology is commonly found in modern engines, such as the 2015 Ford Mustang’s 5.0-liter V8, which utilizes VVT to enhance both power and fuel efficiency.

VVT camshafts provide the best of both worlds by delivering strong low-end torque and high-end power. The ability to alter timing events dynamically ensures that the engine operates efficiently, regardless of driving conditions. While more complex than traditional camshafts, VVT systems offer unmatched versatility and performance improvements.

Custom Grind Camshafts

For those seeking a truly personalized performance upgrade, custom grind camshafts offer the ultimate solution. These camshafts are designed specifically to match an engine’s unique characteristics and the owner’s performance goals. A custom grind camshaft can transform a 1991 Chevrolet Corvette’s LT5 engine into a high-performance powerhouse.

The process of creating a custom grind camshaft involves working with a camshaft specialist to determine the optimal specifications for the desired application. While this option can be more expensive, it provides the most precise performance gains tailored to the specific needs of the vehicle. Custom grind camshafts are the pinnacle of engine tuning for dedicated enthusiasts.